how to add simple health bar to my project please help. ..
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This topic has been dealt with many times in these forums. A simple search of the forums would have shown a plethora of ways to implement a health bar. For example, take a look at my post in this topic:
viewtopic.php?f=147&t=126613&hilit=+health
There are also many tutorials covering this information. Take a look at this one:
https://www.scirra.com/tutorials/447/health-bar